From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03C1BC4167D for ; Tue, 12 Oct 2021 18:38:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF842610EA for ; Tue, 12 Oct 2021 18:37:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234700AbhJLSkA (ORCPT ); Tue, 12 Oct 2021 14:40:00 -0400 Received: from mga03.intel.com ([134.134.136.65]:46818 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234577AbhJLSj6 (ORCPT ); Tue, 12 Oct 2021 14:39:58 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10135"; a="227195754" X-IronPort-AV: E=Sophos;i="5.85,368,1624345200"; d="scan'208";a="227195754" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2021 11:37:24 -0700 X-IronPort-AV: E=Sophos;i="5.85,368,1624345200"; d="scan'208";a="562780711" Received: from akleen-mobl1.amr.corp.intel.com (HELO [10.209.115.208]) ([10.209.115.208]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2021 11:37:20 -0700 Message-ID: <2c9e9cdc-041c-1310-8063-115b678974d3@linux.intel.com> Date: Tue, 12 Oct 2021 11:37:19 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared_range() Content-Language: en-US To: Christoph Hellwig , "Michael S. Tsirkin" Cc: Kuppuswamy Sathyanarayanan , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , Bjorn Helgaas , Richard Henderson , Thomas Bogendoerfer , James E J Bottomley , Helge Deller , "David S . Miller" , Arnd Bergmann , Jonathan Corbet , Paolo Bonzini , David Hildenbrand , Andrea Arcangeli , Josh Poimboeuf , Peter H Anvin , Dave Hansen , Tony Luck , Dan Williams , Kirill Shutemov , Sean Christopherson , Kuppuswamy Sathyanarayanan , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, virtualization@lists.linux-foundation.org References: <20211009003711.1390019-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20211009003711.1390019-13-sathyanarayanan.kuppuswamy@linux.intel.com> <20211011142956-mutt-send-email-mst@kernel.org> From: Andi Kleen In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/11/2021 10:31 PM, Christoph Hellwig wrote: > On Mon, Oct 11, 2021 at 03:09:09PM -0400, Michael S. Tsirkin wrote: >> The reason we have trouble is that it's not clear what does the API mean >> outside the realm of TDX. >> If we really, truly want an API that says "ioremap and it's a hardened >> driver" then I guess ioremap_hardened_driver is what you want. > Yes. And why would be we ioremap the BIOS anyway? It is not I/O memory > in any of the senses we generally use ioremap for. I/O memory is anything outside the kernel memory map. -Andi